Paper sheet separation and transfer apparatus

Abstract

A paper sheet separation and transfer apparatus has a take-out roller which takes out stacked paper sheets onto a transfer path, a first separation unit, and a second separation unit. When the front end of a first paper sheet in the transfer direction reaches a nip of the second separation unit, the take-out roller and first feed roller are “decelerated”.

1. A paper sheet separation and transfer apparatus comprising:
 a take-out roller which rotates and contacts a paper sheet at one end of a stack of a plurality of paper sheets, and takes out the paper sheet onto a transfer path; 
 a first separation unit having a first feed roller which contacts the paper sheet taken out onto the transfer path and rotates forward, and a first separation roller which is pressed to the first feed roller through the transfer path, and separates second and following paper sheets taken out together with the first paper sheet by giving a reverse separating force; 
 a second separation unit having a second feed roller which contacts the paper sheet passed through the first separation unit and rotates forward, and a second separation roller which is pressed to the second feed roller through the transfer path, and separates second and following paper sheets taken out together with the first paper sheet by giving a reverse separating force; 
 a state detection unit which detects the state that a plurality of paper sheets exist between the second feed roller and second separation roller; and 
 a control unit which decelerates the peripheral speed of the first feed roller, when the state detection unit detects said state. 
 
     
     
       2. The paper sheet separation and transfer apparatus according to  claim 1 , wherein the control unit stops the first feed roller, when the state detection unit detects said state. 
     
     
       3. The paper sheet separation and transfer apparatus according to  claim 1 , wherein the control unit rotates the first feed roller in the reverse direction, when the state detection unit detects said state. 
     
     
       4. The paper sheet separation and transfer apparatus according to  claim 1 , wherein the control unit returns the peripheral speed of the first feed roller to the original speed, when said state is reset. 
     
     
       5. The paper sheet separation and transfer apparatus according to  claim 1 , wherein the control unit decelerates the peripheral speed of the take-out roller, when the state detection unit detects said state. 
     
     
       6. The paper sheet separation and transfer apparatus according to  claim 5 , wherein the control unit returns the peripheral speed of the take-out roller to the original speed, when said state is reset. 
     
     
       7. The paper sheet separation and transfer apparatus according to  claim 1 , further comprising a press mechanism which presses the take-out roller to a paper sheet, wherein the control unit controls the press mechanism to lower the pressing force of the take-out roller, when the state detection unit detects said state. 
     
     
       8. The paper sheet separation and transfer apparatus according to  claim 7 , wherein the control unit controls the press mechanism to return the pressing force of the take-out roller to the original force, when said state is reset. 
     
     
       9. The paper sheet separation and transfer apparatus according to  claim 1 , wherein the control unit lowers the separating force of the first separation roller, when the state detection unit detects said state. 
     
     
       10. The paper sheet separation and transfer apparatus according to  claim 9 , wherein the control unit returns the separating force of the first separation roller to the original force, when said state is reset. 
     
     
       11. The paper sheet separation and transfer apparatus according to  claim 1 , wherein the state detection unit detects the rotation speed of the second separation roller, and detects said state based on the result of the detection.